提升康明斯2.7CTI缸体水套内腔质量的工艺措施  

Technological Measures to Improve the Inner Cavity Quality of Cummins 2.7 CTI Cylinder Water Jacket

作　　者：张伟光 赵永征[1] 龚连金 刘浩辉[1] ZHANG Weiguang;ZHAO Yongzheng;GONG Lianjin;LIU Haohui(Hefei Jianghuai Casting Co.,Ltd.,Hefei 231137,Anhui China)

机构地区：[1]合肥江淮铸造有限责任公司,安徽合肥231137

出　　处：《铸造工程》2022年第4期44-48,共5页Foundry Engineering

摘　　要：介绍了康明斯2.7 CTI柴油发动机缸体水套砂芯的结构特点,针对研发试制过程中水套内腔出现的粘砂、变形、断芯等问题,分析了与内腔质量强相关的工艺管控要素。通过采用宝珠砂冷芯制备工艺、涂刷锆英粉醇基涂料、设计随形排气镶块以及清理工序的调整和完善,最终获得了水套内腔光洁、尺寸合格的优质铸件,满足了产品的批量化生产需求。This paper introduces the structural characteristics of Cummins 2.7 CTI diesel engine block water jacket sand core.Aiming at the problems of sand burning,deformation and core breaking in the water jacket inner cavity during the development and trial production,the process control factors related to the quality of the inner cavity are analyzed.By adopting ceramic foundry sand cold core preparation process,coating zircon powder alcohol based coating,designing shaped exhaust insert and adjusting and improving cleaning process,the quality castings with smooth inner cavity and qualified size were obtained,which met the requirements of mass production of products.

关 键 词：水套内腔 变形 宝珠砂 排气镶块 

分 类 号：TG250.6[金属学及工艺—铸造]